What does the term "opensource" refer to in software?

The term "opensource" in software specifically refers to software that has its source code made available to the public. This means that users not only have the ability to use the software but can also access, modify, and distribute the source code according to their needs. This fosters a collaborative development environment where anyone can contribute to improving the software or tailoring it for specific purposes.

Openness in the software's development is a key aspect of open-source licensing. Unlike proprietary software, where the source code is kept secret and there's a restriction on sharing or modifying the software, open-source software promotes transparency and community involvement. This has led to the development of a wide array of software projects, from operating systems like Linux to applications like Apache and Firefox, showcasing the benefits of collaborative efforts.

In contrast, software that requires licenses for use, is available only for purchase, or can only be installed on one computer does not embody the principles of open-source. These aspects highlight the restrictions imposed by proprietary software models, which are contrary to the open-source philosophy.